<!DOCTYPE html>
<html>
<head>

<script>
function boom()
{
  var s = document.getElementById("s");
  var t = document.getElementById("t");

  s.parentNode.removeChild(s);
  t.style.display = "none";
}
</script>

<style id="s">
.float { float: right; height: 1em; }
</style>

<style>
#t { border: 1px solid green; }
</style>

</head>

<body onload="boom();">
<div style="-moz-column-count: 2;"><div id="t" class="float"></div></div>
</body>

</html>
